16409393 has 32 divisors (see below), whose sum is σ = 22391040. Its totient is φ = 11681280.

The previous prime is 16409387. The next prime is 16409411. The reversal of 16409393 is 39390461.

It is not a de Polignac number, because 16409393 - 2⁴ = 16409377 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16409333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169121 + ... + 169217.

It is an arithmetic number, because the mean of its divisors is an integer number (699720).

Almost surely, 2^16409393 is an apocalyptic number.

16409393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16409393 is a deficient number, since it is larger than the sum of its proper divisors (5981647).

16409393 is an equidigital number, since it uses as much as digits as its factorization.

16409393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 16409393 is about 4050.8508982682. The cubic root of 16409393 is about 254.1153143708.

The spelling of 16409393 in words is "sixteen million, four hundred nine thousand, three hundred ninety-three".